The Nomad Design Madmacs are the pinnacle of high speed trolling lure design. Featuring Nomad Design's patented Autotune towpoint system, the Madmacs can adjust its tuning in direct response to its trolling speed to ensure straight and deep tracking at all times. The Autotune system is also responsible for maintaining the lure's side to side vibrating action from speeds as low as 5 knots to speeds as high as 20 knots. The Madmacs is constructed with trademark Nomad features such as Metal Matrix full body plate, which makes it virtually impossible for a fish to break this lure, and HD Foam Filled System.